Apple has released the third beta of its iOS 7.1 software to developers, just a few weeks after their second beta introduced us to button shapes, a new calendar list view toggle, a hidden Car Display control and several other tweaks and performance improvements.

Update: iOS 7.1 Released to the Public (3/10/14)

What's New in iOS 7.1 Beta 3

With this current build fresh out of the oven, I'm going to go through some of the new features and tweaks that are in this latest version of iOS 7.1.

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New Round Buttons

Sticking to one shape, Apple has scrapped the rectangular call and end buttons for circular ones—matching the numbers and other options in the phone dialer.

If you hold down the power key at the top of the iPhone, you'll see that the confirmation icons when powering off your device are also rounded now.

Redesigned Keyboard

While the dark keyboard that was introduced in the first beta (and trashed in the second) is still missing, Apple has tweaked with the stock keyboard a bit—changing the design of both the shift and delete key.